/*
 * Copyright (c) 2006-2007, AIOTrade Computing Co. and Contributors
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *  o Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 *    
 *  o Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution. 
 *    
 *  o Neither the name of AIOTrade Computing Co. nor the names of 
 *    its contributors may be used to endorse or promote products derived 
 *    from this software without specific prior written permission. 
 *    
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package chana.timeseries.datasource

import chana.timeseries.descriptor.Content
import chana.util.ServiceLoader
import java.util.Properties
import java.util.logging.Logger

/**
 *
 * @author  Caoyuan Deng
 * @version 1.0, December 1, 2006, 10:20 PM
 * @since   1.0.4
 */
object PersistenceManager {
  private val log = Logger.getLogger(this.getClass.getName)

  private lazy val manager: PersistenceManager = {
    val x = ServiceLoader.load(classOf[PersistenceManager]).iterator.next
    log.info("Use PersistenceManager: " + x.getClass.getName)
    x
  }

  def apply(): PersistenceManager = manager

}
/** Interface of PersistenceManager */
trait PersistenceManager {
  def restoreProperties
  def saveProperties
  def properties: Properties

  def saveContent(content: Content)
  def restoreContent(identifier: String): Content
  def defaultContent: Content

  def lookupAllRegisteredServices[T](tpe: Class[T], folderName: String): Seq[T]
}

